gaussian.glmMCMC calls glm with "quasipoisson" family

[TeoGiane]

In CARBayes v 6.1.1, inside gaussian.glmMCMC there is a call to function glm with family = "quasipoisson" instead of "gaussian", as one should expect. As a consequence, calling:

> CARBayes::S.glm(formula=formula, family="gaussian", data = data, burnin=2000, n.sample=10000

outputs the following error:

Setting up the model.
Error in eval(family$initialize) : 
  negative values not allowed for the 'quasiPoisson' family

@Neseemo and I have already fix the typo with the right family. You can find the fixed version here. I did not open a PR on cran/CARBayes because it is said to be "unofficial". Let me know if I have to open it.